Recent publication:

○ T.Watanabe, H.Yokoyama, K.Kobayashi: "Antiferromagnetism and pairing
symmetries in two-dimensional t-J model", Physica C 470, S106 (2010).

○ K.Kobayashi, T.Watanabe and H.Yokoyama,: "Competition and coexistence
of antiferromagnetism and superconductivity in the Hubbard model",
Physica C 470, S947 (2010).

○ H.Yokoyama, M.Ogata and K.Kobayashi: "Close Relation between Antinodal
Fermi-Surface Effect and Superconductivity in Cuprates", Physica C 470
S149 (2010).

○ K.Kobayashi, H.Yokoyama: "Superconductivity and antiferromagnetism in
phase diagram of frustrated Hubbard model within variational study",
Physica C 470, 1081 (2010).

○ T.Miyagawa, H.Yokoyama: "Doublon-holon-binding mechanism of Mott
transition in low dimensional Hubbard model.", Physica C 471, 738-742
(2011).

○ H.Yokoyama, T.Miyagawa and M.Ogata: "Mechanism of superfluid-insulator
transition in two dimensional Bose Hubbard model.", Physica C 471, 730-734
(2011).

○ T.Miyagawa and H.Yokoyama: "Effects of Long-Range Correlations on
Nonmagnetic Mott Transitions in Hubbard model on Square Lattice.",
J.Phys.Soc.Jpn. 80, 084705 (2011). (ArXiv:1104.0109).

○ H.Yokoyama, T.Miyagawa and M.Ogata: "Effect of Doublon-Holon Binding
on Mott transition---Variational Monte Carlo Study of Two-Dimensional
Bose Hubbard Models.", J.Phys.Soc.Jpn. 80, 084607 (2011).
(ArXiv:1104.0516). * This paper is awarded Editors' Choice in JPSJ.

○ S.Tamura, H.Yokoyama: "Spin-gapped wave function as normal state
in attractive Hubbard model.", Phys. Proc. 27, 76 (2012).

○ H.Yokoyama, S.Tamura, T.Miyagawa, K.Kobayashi, M.Ogata: "Strongly
correlated nature of d-wave superconductivity in cuprates.", Phys. Proc.
27, 60 (2012).

○ Y.Toga, H.Tsuchiura, M.Yamashita, K.Inaba, H.Yokoyama: "Mott
Transition and Spin Structures of Spin-1 Bosons in Two-Dimensional Optical
Lattice at Unit Filling.", J.Phys.Soc.Jpn. 81, 063001 (2012).
(ArXiv:1204.1175).

○ S.Tamura, H.Yokoyama: "Variational Monte Carlo Study of Spin-Gapped
Normal State and BCS-BEC Crossover in Two-Dimensional Attractive
Hubbard Model", J.Phys.Soc.Jpn. 81, 064718 (2012).
(ArXiv:1203.1719).

○ H.Yokoyama, M.Ogata, Y.Tanaka, K.Kobayashi, H.Tsuchiura: "Crossover
between BCS Superconductor and Doped Mott Insulator of d-wave Pairing State
in Two-Dimensional Hubbard Model", J.Phys.Soc.Jpn. 82, 014707 (2013).
(ArXiv:1208.1102). * This paper is awarded JPSJ's Most Cited Articles in 2014.

○ H.Yokoyama, S.Tamura, K.Kobayashi, M.Ogata: "Variational study of
conduction in doped Mott insulator in terms of kinetic energy", Phys.
Proc. 45, 9 (2013).
(ArXiv:1211.6175).

○ S.Tamura, H.Yokoyama: " Variational study of Mott transition by means
of Drude weight and superfluid density", Phys. Proc. 45, 5 (2013).

○ K.Kobayashi, H.Yokoyama: " Coexistence of superconductivity and
antiferromagnetism and its effects on crossover as to correlation strength
in Hubbard model", Phys. Proc. 45, 17 (2013).

○ K.Kobayashi, H.Yokoyama: "Band Renormalization Effect on Interplay
between Antiferromagnetism and Superconductivity in Hubbard Model in
Hubbard model", JPS Conf. Proc. 1 (2014) 012120.

○ K.Kobayashi, H.Yokoyama: "Coexistence and Mutual Exclusion of
Superconductivity and Antiferromagnetism and Phase Separation in Hubbard
Model", JPS Conf. Proc. 3 (2014). 015012

○ S.Tamura, H.Yokoyama: "Variational Approach to Localization Length
for Two-Dimensional Hubbard Model ", JPS Conf. Proc. 3 013003 (2014).
(arXiv:1404.2995)

○ T.Watanabe, H.Yokoyama, M.Ogata: "Superconductivity and Non-Fermi-
Liquid Metal in Carrier-Doped Triangular Hubbard Model ", JPS Conf. Proc.
3, 013004 (2014).

○ H.Yokoyama, S.Tamura, M.Ogata: "Effect of Diagonal Hopping on Staggered
Flux State in Square-Lattice Hubbard Model ", JPS Conf. Proc. 3, 012029
(2014).

○ K.Kobayashi, H.Yokoyama: "Superconductivity and phase separation in
extended Hubbard model ", Phys. Proc. 58 (2014) 22.

○ S.Tamura, H.Yokoyama: "Spin-current state in anisotropic triangular
Heisenberg model ", to appear in Phys. Proc. 58 (2014) 10.

○ H.Yokoyama, S.Tamura, T.Watanabe, K.Kobayashi, M.Ogata: "Stability
of staggered flux state for anisotropic triangular lattice", Phys. Proc. 58
(2014) 14.

○ S.Tamura, H.Yokoyama: "Stability of staggered flux state in d-p model
studied using variational Monte Carlo method. ", to appear in Phys. Proc.
(2015).

○ K.Kobayashi, H.Yokoyama: "Effects of weak intersite repulsion and
negative diagonal transfer on superconductivity and antiferromagnetism in
Hubbard model ", to appear in Phys. Proc. (2015).

○ Y.Toga, H.Yokoyama: "Variational study on loop currents in Bose Hubbard
model with staggered flux.", to appear in Phys. Proc. (2015).

○ H.Yokoyama, R.Sato, S.Tamura, M.Ogata: "Effects of diagonal hopping on
stability of antiferromagnetic state", to appear in Phys. Proc. (2015).

○ S.Tamura, H.Yokoyama: "Drude and Superconducting Weights and Mott
Transitions in Variation Theory, to appear in J. Phys. Soc. Jpn. (2015).
(arXiv:1502.04799). * This paper is awarded Editors' Choice in JPSJ.

○ 横山 寿敏, 田村 駿，栂 裕太: "モット転移とその周辺の物理---多体変分法の視点から---
(その1)"，「固体物理」（アグネ技術センター）, 51 (No.3), 161 (2016).
　【 訂正があります (Eratta) 】

○ 横山 寿敏, 田村 駿，栂 裕太: "モット転移とその周辺の物理---多体変分法の視点から---
（その2：最終回）"，「固体物理」（アグネ技術センター）, 51 (No.4), 237 (2016).

○ S.Tamura, H.Yokoyama: "Variational Study of Magnetic Ordered State
in d-p Model", Phys. Proc. 81, 5 (2016).

○ Y.Toga, H.Yokoyama: "Loop-Current and Antiferromagnetic States in
Fermionic Hubbard Model with Staggered Flux at Half Filling", Phys. Proc.
81, 13 (2016).
(ArXiv:1511.04225)

○ R.Sato, H.Yokoyama: "Band-Renormalization Effect in Coexistent State
of d-wave Superconducting and Antiferromagnetic Orders for Hubbard
Model", Physica C 530, 5 (2016).

○ K.Kobayashi, R.Sato, H.Yokoyama: "Band-Renormalization Effect on
Relationship between Superconductivity and Antiferromagnetism in t-J
Model", Phys. Proc. 81, 1 (2016).

○ H.Yokoyama, R.Sato, K.Kobayashi: "Predominance of Antiferromagnetism
in Two-Dimensional Underdoped Hubbard Model", Phys. Proc. 81, 9 (2016).

○ R.Sato, H.Yokoyama: "Band-Renormalization Effect and Predominant
Antiferromagnetism in Two-Dimensional Underdoped Hubbard Model",
J. Phys. Soc. Jpn. 85, 074701 (2016). (ArXiv:1605.04514)
【Preprint ---high resolution---】

○ H.Yokoyama, S.Tamura, M.Ogata: "Staggered Flux State in Two-
Dimensional Hubbard models", J. Phys. Soc. Jpn. 85, 124707 (2016).
(arXiv:1610.04818)
【Preprint ---high resolution---】

○ R.Sato, H.Yokoyama: "Band-renormalization effects on antiferromagnetism
and d-wave superconductivity in two-dimensional t-J model", J. Phys.
Conf. Ser. 871, 012014 (2017).

○ K.Kobayashi, H.Yokoyama: "Interplay between staggered flux and
d-wave superconducting states in Hubbard Model", J. Phys. Conf. Ser.
871, 012031 (2017).

○ H.Yokoyama, R.Sato, K.Kobayashi: "Effect of impurity potentials on
antiferromagnetism in two-dimensional Hubbard model", J. Phys. Conf.
Ser. 871, 012032 (2017).

○ R.Sato, H.Yokoyama: "Interhole correlation and Phase Separation in
t-J model ", J. Phys. Conf. Ser. 1054, 012015 (2018).

○ K.Kobayashi, H.Yokoyama, Y.Toga: "Interplay between staggered flux
and d-wave superconducting orders in t-t'-J model ", J. Phys. Conf. Ser.
1054, 012016 (2018).

○ H.Yokoyama, R.Sato, K.Kobayashi: "Impurity-induced Mott transitions
in partially filled antiferromagnetic states", J. Phys. Conf. Ser. 1054,
012014 (2018).

○ R.Sato, H.Yokoyama: "Band-Renormalization Effects on Superconductivity
and Antiferromagnetism in Two-Dimensional t-J Model", J. Phys. Soc. Jpn.
87, 114003 (2018). (ArXiv:****.****)
【Preprint ---high resolution---】

○ R.Sato, H.Yokoyama: "Impurity effects on d_x2-y2-wave superconducting
state in strongly correlated Hubbard model", J. Phys. Conf. Ser. 1293,
012029 (2019).

○ K.Kobayashi, H.Yokoyama: "Relationship between superconductiviry and
anisotropy in two-dimensional Hubbard model ", J. Phys. Conf. Ser. 1293,
012025 (2019).

○ H.Yokoyama, R.Sato, K.Kobayashi: "Impurity induced insulator-to-metal
transitions in half-filled Mott insulators", J. Phys. Conf. Ser. 1293,
012024 (2019).

○ K.Kobayashi, H.Yokoyama: "Pomeranchuk Instability in Strongly
Correlated Hubbard Model ", to be published in JPS Conf. Proc. (2020).

○ H.Yokoyama, R.Sato, K.Kobayashi, T.Watanabe, M.Ogata: "Metallization
of Mott Insulators through Percolation in Partially Filled Impurity
Hubbard Model", to be published in JPS Conf. Proc. (2020).

○ T.Watanabe, H.Yokoyama, K.Kobayashi: "Impurity Effect on Magnetism
and Mott Transitions in Hubbard Model on Anisotropic Triangular Lattice",
to be published in JPS Conf. Proc. (2020).

○ K.Kobayashi, H.Yokoyama: "Possibility of Pomeranchuk instability in
staggered flux state ", to be published in J. Phys. Conf. Ser. (2020).

○ H.Yokoyama, K.Kobayashi, T.Watanabe, M.Ogata: "Insulator-to-
superconductor transition by exciting half-filled d-wave pairing
state beyond Mott gap", to be published in J. Phys. Conf. Ser. (2020).